VLAN Principles and Configuration Inter-VLAN Communication

1.When the Trunk port send the data frame, how to deal with?

• When the VLAN ID is the same as the PVID of the port and is a VLAN ID allowed by the port, remove the Tag and send the message
  

• When the VLAN ID is different from the PVID of the port, the data frame is dropped
  

• When the VLAN ID is different from the PVID of the port, replace it with PVID forwarding
  

• When the VLAN ID is different from the PVID of the port, strip off the TAG and forward
  

How many bits are there in the VLAN ID in the VLAN format defined by IEEE802.1Q?

• 6

• 10

• 12
  

• 8

1. If the PVID of a trunk interface is 5 and the port trunk allow-pass vlan 2 3 command is run on the interface, which VLANs' frames can be transmitted through the trunk interface?

• Only VLAN 5 frames can be transmitted through the trunk interface.

• Only VLAN 2 and 3 frames can be transmitted through the trunk interface.

• VLAN 2, 3, and 5 frames can be transmitted through the trunk interface.

• No VLAN frames can be transmitted through the trunk interface.

1. The number of VLANs that can be created using the commands "vlan batch 10 20" and "vlan batch 10 to 20" respectively is
   

• 11 and 11
  

• 11 and 2

• 2 and 2

• 2 and 11

Answer explanation

1. "vlan batch 10 20" - This command typically creates two VLANs: VLAN 10 and VLAN 20. So, this creates 2 VLANs.

2. "vlan batch 10 to 20" - This command generally creates a range of VLANs from 10 through 20, inclusive. This would include VLANs 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, and 20. In total, this creates 11 VLANs.

(Multiple) Which of the following statements about the VLAN technology are incorrect?

• 1. The VLAN technology can isolate a large collision domain into several small collision domains.

• 1. The VLAN technology can isolate a large Layer 2 broadcast domain into several small Layer 2 broadcast domains.

• 1. PCs in different VLANs cannot communicate.

• 1. PCs in the same VLAN can communicate at Layer 2.

Answer explanation

Explanation:

• PVID (Port VLAN ID) is the VLAN ID assigned to untagged frames that are received on this port. So, untagged incoming traffic will be assigned to VLAN 5.

• The command port trunk allow-pass vlan 2 3 specifically configures the trunk port to allow passage of frames belonging to VLAN 2 and 3. This refers to tagged traffic; only frames tagged with VLAN 2 or 3 identifiers will be allowed to pass through the trunk.

• Therefore, only VLAN 2 and 3 frames (tagged as such) will be transmitted through the trunk. Frames from VLAN 5 will only be accepted if they come in untagged and will not be transmitted unless they are tagged as VLAN 2 or 3 on exit.

As shown in the figure, if host A and host B want to achieve inter-VLAN communication through single-arm routing, which configuration should be done under the G0/0/1.1 interface of RTA?

• dot1q termination vid 30

• dot1q termination vid 20

• dot1q termination vid 10

• dot1q termination vid 40

The network administrator created VLAN 10 on the Layer 3 switch and configured an IP address under the virtual interface of the VLAN. When the command "display ip interface brief" is used to check the port status, it is found that the VLANIF 10 interface is in the down state. What should be done to restore the VLANIF 10 interface to normal?

• Add an interface that must be Up and must be of type Trunk into VLAN 10

• Assign any physical interface to VLAN 10
  

• Assign a physical interface that must be Up to VLAN 10
  

• Use the command "undo shutdown" under VLANIF 10 interface

What is the range of VLAN ID that users can use?

• 1-4096
  

• 1-4094
  

• 0-4096

• 0-4095

The switch GO/0/1 port configuration information is shown in the figure. Which VLAN data frame does the switch forward without VLAN TAG?
#

interface GigabitEtherneto/o/1
port link-type trunk
port trunk pvid vlan 10
port trunk allow-pass vlan 10 20 304o

• 10
  

• 30
  

• 20
  

• 40

The configuration information of a certain port of the switch is shown in the figure, then this port carries VLAN TAG when sending data frames carrying which VLAN?
interface GigabitEtherneto/0/1
port hybrid tagged vlan 2 to 3 100

port hybrid untagged vlan 4 6

• 1,2.3,100
  

• 2.3.100

• 1,2.3.4.6,100

• 2.3.4.6,100